A dirty Bronagh is when you get corn on the cob insert it in your arse until it comes out your nose while fingering, then you place it in a bowl squriting all over it to cook it finishing with delicious popcorn.
a mixture of bro and poonani which results in a word that means a bro who gets mad poonani
a man (typically a broski bro) who has enjoyed the company of many fine women
"Look at him, mackin that fine tittied biddy, what a bronani."
"He is a fuckin bronani."